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     * 获取当前页面的url路径
     * host主机（ip）+端口
     * hostname 主机名
     * port 端口
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    var searchStr = location.search;
     console.log(searchStr);
     searchStr = searchStr.slice(1);
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     var obj = {};
     console.log(arr);
     for(var i = 0; i < arr.length; i++){
         var childArr = arr[i].split("=");
         obj[childArr[0]] = childArr[1];//使用中括号的形式（变量）来往obj中加入新属性
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